Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add andregusman-raiz/a-gusman-claude --skill xlsxgit clone --depth 1 https://github.com/andregusman-raiz/a-gusman-claudeWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/andregusman-raiz/a-gusman-claude/xlsx)<a href="https://agentmods.dev/skills/andregusman-raiz/a-gusman-claude/xlsx"><img src="https://agentmods.dev/badge/skills/andregusman-raiz/a-gusman-claude/xlsx/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/andregusman-raiz/a-gusman-claude/xlsx"><img src="https://agentmods.dev/badge/skills/andregusman-raiz/a-gusman-claude/xlsx.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Excessive Agency · line 4 Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00036 | $0.02859 |
| Opus 5 | $0.00018 | $0.01430 |
| Sonnet 5 | $0.00007 | $0.00572 |
| Haiku 4.5 | $0.00004 | $0.00286 |
Grade A, and why
xlsx scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 345 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Excel (.xlsx) — Skill Completo
Baseado em: anthropics/skills (oficial), tfriedel/claude-office-skills e zgldh/xlsx-populate-skill
Quando Usar
- Criar planilha nova (relatorios, dashboards, modelos financeiros)
- Editar Excel existente preservando formatacao/formulas
- Analisar dados de planilhas (estatisticas, limpeza, transformacao)
- Converter entre formatos tabulares (CSV ↔ XLSX)
Quando NAO Usar
- Deliverable e Word/HTML/PDF (mesmo com dados tabulares)
- Google Sheets API integration
- Apenas ler dados sem gerar arquivo
Requisitos para Todos os Outputs
Fonte Profissional
- Arial ou Times New Roman, consistente em todo o documento
Zero Erros de Formula
- TODA planilha entregue com ZERO erros: #REF!, #DIV/0!, #VALUE!, #N/A, #NAME?
Preservar Templates Existentes
- Ao modificar arquivos existentes: manter formato, estilo e convencoes originais
- Convencoes do template SEMPRE prevalecem sobre estas guidelines
Bibliotecas
Python (openpyxl + pandas) — Padrao
- openpyxl: Formulas, formatacao complexa, multiplas abas, merge cells
- pandas: Analise de dados, bulk operations, export simples
Node.js (xlsx-populate) — Alternativa para preservar formatacao
- xlsx-populate: Editar Excel preservando formatacao original, merged cells, estilos
- Instalar:
npm install xlsx-populate
Decisao
| Necessidade | Biblioteca |
|---|---|
| Criar planilha com formulas/formatacao | openpyxl |
| Analise de dados, bulk ops | pandas |
| Editar Excel sem perder formatacao | xlsx-populate (Node) |
| Datasets grandes (10k+ linhas) | pandas → openpyxl |
Workflow Principal
- Escolher biblioteca: pandas (dados) ou openpyxl (formulas/formatacao)
- Criar/Carregar: Workbook novo ou existente
- Modificar: Dados, formulas, formatacao
- Salvar: Gravar arquivo
- Recalcular formulas (OBRIGATORIO se usou formulas):
python ~/.claude/skills/xlsx/scripts/recalc.py output.xlsx - Verificar erros: Se
status: errors_found, corrigir e recalcular
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 345 lines · 36 tokens per session scan A a4548454ab21
xlsx is a skill published in the GitHub repository andregusman-raiz/a-gusman-claude (19 stars, last pushed 3d ago), licensed MIT. It adds 36 tokens to every session and 2,859 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
xlsx
Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify…
minimax-xlsx
Open, create, read, analyze, edit, or validate Excel/spreadsheet files (.xlsx, .xlsm, .csv, .tsv). Use when the user asks to create, build, modify, analyze, read, validate, or format any Excel spreadsheet, financial model, pivot table, or tabular data file. Covers: creating new xlsx from scratch, reading and analyzing…
gog
Google Workspace CLI for Gmail, Calendar, Drive, Contacts, Sheets, and Docs.
gws-sheets
Google Sheets: Read and write spreadsheets.
gws-sheets-append
Google Sheets: Append a row to a spreadsheet.
gws-sheets-read
Google Sheets: Read values from a spreadsheet.